<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        select{
            width: 200px;
            appearance: none;
            background-image: url(../地图.png);
            background-repeat: no-repeat;
            background-size: 14px;
            background-position: right center;
        }
    </style>
</head>
<body>
    <form action="">
        <select>
            <option value="">1</option>
            <option value="">19</option>
            <option value="">31</option>
            <option value="">14</option>
        </select>
    </form>
</body>
</html>